145552613 has 2 divisors, whose sum is σ = 145552614. Its totient is φ = 145552612.

The previous prime is 145552577. The next prime is 145552619. The reversal of 145552613 is 316255541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141300769 + 4251844 = 11887^2 + 2062^2 .

It is a cyclic number.

It is not a de Polignac number, because 145552613 - 2¹² = 145548517 is a prime.

It is a super-2 number, since 2×145552613² = 42371126302255538, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145552613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145552619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72776306 + 72776307.

It is an arithmetic number, because the mean of its divisors is an integer number (72776307).

Almost surely, 2^145552613 is an apocalyptic number.

It is an amenable number.

145552613 is a deficient number, since it is larger than the sum of its proper divisors (1).

145552613 is an equidigital number, since it uses as much as digits as its factorization.

145552613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 32.

The square root of 145552613 is about 12064.5187637137. The cubic root of 145552613 is about 526.0253437070.

The spelling of 145552613 in words is "one hundred forty-five million, five hundred fifty-two thousand, six hundred thirteen".